Stencil machine



Aug 18, 1942; H. w. HEMPEL ET AL STENCIL MACHINE File d June 3, 1939 6Sheets-Sheet l w R N E A 0 M r /w r N C i MW W M w Aug. 18, 1942. H. w.HEMPEL ET AL 2,293,339

STENCIL MACHINE Filed June 3,1959 6 Sheets-Sheet 2 VTTORMEK Aug.18,1942. H.W.HEMPEL m1. 7 2,293 339 STENCIL MACHINE Filed Julie 3, 19396 Sheets-Sheet 3 /A//-wro ?s." .r/s/vaeer W. f/EMPEL, WALTON a. wines/40210M Q.

Aug. 18, 1942. H. W.-HEMP EL ET-AL STENC IL MACHINE Filed June 3, 1939 6Sheets-Sheet 4 QQ Q Q Q Q R VIII/Ill!!! xxx H. W. HEMPEL ETAL zgls,1942.

STENCIL MACHINE Filed June 5, 1939 v m? 5 A E. t & M w x wrc m. 3Q s 57a Z S m\ 1 a w 1 V 5 FI IIIE. I

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m/amen s- 18,194 H. w. HEMPEL ETAL 2,293,339

STENCIL MACHINE Filed June 3, 1939 6 Sheets-Sheet 6 Patented Aug. 18,1942 OFFICE STENCIL MACHINE Herbert W. Hempel and Walton C. Marsh,Belleville, Ill.

Application June 3, 1939, Serial No. 277,151

10 Claims. (01. 197-6.7)

The present invention comprehends a stencil cutting machine. In machinesof this kind, there is provided a series of punches and diesrepresenting letters or other characters desired, and they are locatedon a carrier so that the ones used may be selectively brought intoposition of cutting. Locking mechanism, automatically operable, holdsthe carrier during cutting. A work feed, automatically operable withoperation of the punches, advanced the work through the machine forsuccessive cuttings. Presser means clamp the work during the cutting.

Objects of the present invention are to provide a stencil machine havinga bed and a carrier rotatably mounted thereon, with a lubricating systemrequiring a minimum of attention and providing a maximum of efiiciency;and with punches operated eccentrically of the shaft but with a bed andhood designed to distribute the eccentric load to attain a minimum ofstrain there- Other objects include the provision of an operating handleand a linkage so arranged that several operations including centeringand feeding are performed on the same stroke as is the cuttingoperation, to avoid partial spacing with consequent crowding oroverlapping of letters; and the further provision for a greater power inthe linkage during the cutting than during the other operations by thehandle so that the movement of the handle may be short, and attendantgreater speed during the other operations.

Other objects include the provision of readily accessible stop meanscooperating with the handie to aid in spacing without cutting; and pro.-vision of a feed mechanism that may be conveniently adjusted foralignment, that distributes the clamping pressureon the work for maximumefficiency, and that may be adjusted as to pressure applied; and alsothe provision of a convenient latchable mechanism for withdrawing thepresser rolls, and a release therefor.

In the drawings:

Fig. 1 is a plan view, partly broken away, of the machine;

Fig. 2 is a front elevation of the machine with the closure plateremoved;

Fig. 3 is a bottom view;

Fig. 4 is a front-to-rear vertical section taken on the line 4-4 of Fig.1;

Fig. 5 is a vertical transverse section taken on the line 55 of Fig. 3;v

Fig. 6 is a sectional view on the line 66 of Fig. 3 transverse to Fig.5;

Fig. '7 is a horizontal section of the elevation adjustments for theroller supports taken on the line 1-1 of Fig. 5;

Fig. 8 is a transverse vertical section on the line 8-8 of Fig. 3;

Fig. 9 is a horizontal section showing a clip adjustment for one of thepunch springs and taken on the line 99 at the extreme right of Fig. 4; p

. Fig. 10 is a partial View similar to Fig. 2 but with the punchdepressed;

Fig. 11 is a vertical section through the punch pressing and feedmechanism taken on the line 'll|| of Fig.2; V Fig. 121s a section on theline I2- -l 2,.immedi-' ately left of the center, of Fig. 2 showing thefeeder cam in section; Fig. 13 is a horizontal section on the line I3-l3ofFig. 2 showing the punch pressing mechanism and the centeringmechanism both in retracted position;

Fig. 14. is a View similar to apart of Fig. 13 with the centeringmechanism in active position;

Fig. 15 is a vertical longitudinal section similar to the left handportion of Fig. 4 but with the punch depressed; I

Fig. 16 is a transverse section of the front of the mechanism taken onthe line l6lii of Fig. 13, showing the punch press linkage in retractedposition; v Fig. 17 is a View similar to Fig. 16 but with the mechanismin active position;

Fig. 18 is an edge view of the centering mechanism actuating cam;

Fig. 19 is an edge view of a stripper plate and guard;

Fig. 20 is a horizontal section of the stripper plate and guard taken onthe line 20-20 of Fig. 19;

Fig. 21 is a sideelevation of the punch plunger assembly; I

.Fig; 22 is a rear view thereof; and, Fig. 23 is a view of the stencilsheet with cuts therein, such as are made by this machine.

The machine includes a base or bed 30 that has a portion 3| extendingout of the front thereof and a rear circular portion 32. Centrally ofthecircular portion there is a journal box 33 supported by beams from theouter ring 32. The beams include two, 34 and 35, the direction of whichfollowslines drawn from the outer ring 32 at the center of the front totwo points spaced approximately apart at the rear. The two beams 34 and35 terminate at a transverse beam 36 toward the front of the mechanism;and from the junctions therewith of the beams 34 and 35 extend outwardlybeams 31 and 38 that terminate at the outer ring 32. The ring isflattened at 39 across the front. At the front and rear of the journalbox 32 transverse beams 49 and 4| connect the two beams 34 and 35. Fromthe opposite junctions of the beam M with the beams 34 and 35 thereextend the beams 42 and 43 terminating approximately diametricallyopposite on the ring 32. The foregoing arrangement of beams and theirshapes, as indicated, are such as to give a proper distribution offorces, since it will be realized that the punchpressure is off centerand takes place within the area between the beams 35, 31, 38 and 39. Thefirst three of the last named beams have integrally formed therewith aweb 44 that has an abutment screw 45 threaded therein for a purpose tobe described.

The front portion of the base is suitably webbed as will appear. Aboutthe base there are provided a number of feet 46 on which the machinerests, and a number of bosses 41 to receive hood screws to be described.

The journal box 33 is drilled to receive a central shaft 59. It also hasan annular pocket 5! surrounding the shaft in which is mounted a feltoil pad 52, and surrounding the pocket 5I is an annular bearing surface53. The center shaft 59 is pressed into the journal box 33 and is notrotatable with respect thereto.

A die carrier 56 has a long central tubular column 5! journaled on thecenter shaft 59, and bearing at its bottom on the annular surface 53. Aplurality of radial arms 59 extend outwardly from the bottom of thecenter column to a die supporting ring 69 (Fig. 3). About the ring are aseries of spaced screw-receiving openings BI receiving screws 62 thathold dies 63 in place on the ring at a radial distance suflicient topermit them to be brought over the punch area of the bed 30. theuniformity of the screw holes.

Emanating from the central column 57 is a, table 66 to which is boltedan annular punch carrier 61. At its outer edge this punch carrier risesupwardly to provide an upper flange 68 opposite a lower flange 69 whichflanges provide for the guiding of the punches.

Each punch includes a punch shank I slidably mounted in spaced openingsin the flanges 68 and 69. At its upper part, each shank has aplunger-receiving neck II, and between the two flanges an additionalneck I2 to receive a spring clip 13 of the shape shown in Fig. 9. Aboutthe shank there is also a coil spring 14 of the compressions type actingbetween the flange 99 and the clip I2, urging the punch upwardly.

On each shank I0, beneath the flange 69, there is a punch-supportingplate I having a vertically bent tongue I6 guided within a hole TI inthe punch carrier. This latter action prevents rocking of the punchduring the pressing action. Each punch I8 is mounted on a punch plate I9secured to the plate I5.

As is evident, there are a series of punches and dies corresponding tothe desired letters, numbers, and the like. Each punch has itscorresponding die mounted beneath it on the ring 60 and, as will beshown, any pair may be selectively located in cutting position.

Secured to the top of the column 5'! there is a depending portion 82 ofa circular operating hand wheel 83. The operating hand wheel has anindex pointer 84 attached thereto and which cooperates with a dial plate85 mounted on a hub The dies are interchangeable because of 86, whichhub is adjustably secured as at 81 to the center shaft 59. The dial isso arranged that when the pointer 94 is brought to any character on thedial, the punch and die of that character will be located in cuttingposition.

The dial has an oil hole therein immediately above an oil groove 9! inthe center shaft. This groove extends down to a point well below the topof the center column 51. When oil is dropped through the hole 99 andinto the groove 9I it will lubricate the entire bearing and finally thesurplus Will descend to reach the felt pad 5| wherein it is stored toprovide lubrication for an indefinite period, of the bearing 53.

Over the entire top of the machine is a hood or cover 94 through whichthe hand wheel hub passes. There are suitable bosses 95 on the sideedges of the cover to receive screws 95 by means of which the cover issecured to the fastening lugs 41 of the base.

On the front of the machine is the punch centering and actuating meansand a paper feeding means which will now be described. The cover 94 hasa housing 8'5 on the front thereof, in which a large part of the saidmechanism is mounted. This housing includes a main wall 98 and a frontwall 99, the latter having an opening I00 normally closed by a closureplate (not shown).

The wall 99 carries the load applied to the handle, and hence thereaction of which the punching force is the action. The shape of thehood, including its heavy side walls, and the front-to-back ridgeextending along its top, make it substantially rigid so as to minimizedeflections by said reactions.

In the wall 98 there is an opening I02 shaped something like a dumbbellwith enlargements at the top and the bottom joined by a narrowerconnecting portion. This connecting portion has opposed vertical groovesI93 in its edges that receive guides I94 on the opposite sides of apunch actuating plunger, generally indicated at I05. This plunger has anotch I96, somewhat wider than the vertical thickness of the head of thepunch shanks, providing a surface I9! for depressing the punches and anedge I98 for ensuring their withdrawal. As is evident from Fig. 4, whenany punch is brought to actuating position, its head engages in thenotch I06 of the plunger.

The plunger has at its top a pivot pin H9 including a spacing shoulderIII, the latter being sufficient to carry the pivot to the front of thewall 98 as appears in Fig. 15.

A limiting screw II2 having a lock nut II3 thereon is adjustable todetermine the upper limit of movement of the plunger I95, to insure thatthe plunger will be in proper position to en gage over the punch shankheads.

A link plate II5 of the bell crank type has a slot IIG engaging over thepivot III]. The plate in turn is pivotally mounted to the wall 98 on abushing I I I held by a screw I I8.

On the other angle of the link plate I I5, there is pivoted at II9 alink I29, the other end of which is pivoted at I2I to a combination linkand cam plate I22. This latter plate I22 is pinned at I23 to rotate tothe hub I24 of a handle member I25.

The pivot IZI receives one end of a return coil spring I29, the otherend of which is attached at I27 to the wall 98. This is a tension springthat normally pulls the link I29 to the right in Figs. 2, l0, l6 and 17,and with it the associated mechanism, such movement returning the punchto its retracted position.

The plate I22 also has a cam edge I28 engageable with a roller I29located in the middle-of a link I39 pivoted at its upper end to the wall98 on a screw I3I. This link is shown separately in Fig. 18. Its lowerend engages a screw I32-adjustably projecting from the outer end of ahorizontal lever I33 :pivoted at I34 to a boss I35 projecting from theback of the wall 98. The inner end of the lever I33 has a roller I35engageable between adjacent punch shanks to center and hold immovablethe punch carriage in such position that the actuated punch is in exactalignment at the cutting portion of the machine. A coil spring I31 isfastened between the inner end of the lever and the front wall 99 tomaintain the centering lever normally in inactive position.

The handle I 25 and the plate I 22 are mounted on a shaft I38 passingthrough the wall 98 and secured thereto by a nut (Fig. 11). A washer I99 secured to the shaft by a screw prevents the hub I24 from coming offof the shaft.

It is quite evident that during the first and 'major part of themovement of the handle I25,

the punch, although moving down, is above the work and consequently isnot cutting. However, as will be shown, the work feed mechanism is inoperation during such interval. This work feed mechanism is operated offthe pivot II9 between the link plate I I 5 and the link I29. Fig. 12shows this pivot H9 in detail. On its outer end it has a roller I40 heldby a nut I4I, the nut engaging on a shoulder to allow free rotation ofthe roller.

, This roller rides on a cam link I42 that is pivoted -at I43 to thewall 98, but spaced therefrom by a spacer member I44. This cam link I42has a bell crank I45 pivoted at I46 to its other end. A tension springI41 acts on one end of the bell crank lever I45 and is also attached toa pin I48 (Fig. 15) extending from the wall 99. The spring I41 keeps thebell crank lever I45 in a clockwise direction, viewed from the front ofthe machine.

The other end of the bell crank lever has a ratchet dog I50 (Fig. 15)engaging with the teeth of a ratchet wheel I5I that is mounted to rotatewith a serrated feed roller I52 that is attached to the lowest end ofthe wall 98. A light leaf spring I53 (Fig. 17 is secured to the wall 98and ,bears against the back surface of the feed roller I52 to preventits coasting.

The cam link I42 has a cam edge I54 thereon that is engaged by theroller I49. By this means when the crank I25 is depressed the link I20moves to the left and with it the roller I49; and the latter acting uponthe cam edge I54 pivots the cam lever I42 clockwise moving the bellcrank lever I45 downwardly so that its dog I50, maintained in engagementwith the teeth of the ratchet I5I by means of the spring I41, rotatesthe ratchet wheel a given angular distance clockwise, and with itrotates the feed wheel I52. This angular distance is equal to thedistance between the characters.

After the cam roller I40 is moved over the hump of the cam edge I54,addition-a1 movement of the link I20 and the roller I49 about the pivotI'I1 produces no additional movement of the feed roll. The cam isdesigned so that all of the feeding takes place during the firstapproximately of the lowering of the punch and before the actual cuttingoperation takes place.

Where it is desired to limit the action merely to feeding and not topunching, this can be attained by pressing inwardly a button I58 on thehandle I25, which button is attached to a pin I51 having a head I58. Aspring I59 normally maintains the pin and the head I55 in their outwardpositions. When the button is pressed, however, the pin I58 moves outback of the handle I28 in position to engage a knob I60 that is formedas a boss on the front wall 99 of the hood. By the simple expedient'ofpressing the button I55, the operator can move the handle to feed thework forward, and will not have to concern himself with stopping thehandle before cutting, because such is automatically accomplished byengagement of the pin with the knob I89.

The total downward movement of the handle I25 is limited .by engagementof a prom; I6I projecting from the hub I24, and in the path of which ascrew IE2 is adjustably threaded into the top of the housing 91, andmaintained in adjusted position by a look nut.

Spaced fro-m the feed roll I52 is a second follower roll I also mountedon the lower part of the wall 98, it being secured by a screw I66 (Fig.11)

The upper part of the front section 3| of the frame forms a table I61upon which the work rests. The hood 94 is spaced upwardly at its loweredges in the front from the die member 59 and the bed'39 so that thework may be slipped under the hood and under the punches. The two feedrolls I52 and I55 are located above the table I51 and at the rear edgethereof immediately in front of the die member 59.

There are presser rollers I58 and IE9 projecting upwardly through theback part of the table I51 for cooperation respectively with the feed.rolls I 52 and I 85. Both of the rollers I98 and I89 are mounted forrotation on a bar I10 that is restrictedly fioatingly mounted in slotsHI and I12 in webs I13 and I14, respectively, in the lower part of thefront section 3| of the base. Screws IE5 and I'IIi greater in diameterthan the slots are wide are threaded into adjacent walls of the slotsand held by lock nuts I11 to restrict downward movement of the ends ofthe bar I10.

The bar has a link I89 pivoted to a point slightly off-center thereof,and extending downwardly therefrom. This plate is engaged by a pin I8Ieccentrically formed on the end of the shaft I82, which shaft isjournaled in a bearing I83 in a middle web of the front portion 3i ofthe device and a bearing I84 in a front web of wall I85 that is indentedfrom the main part of the front wall of the machine, as shown at I86.The shaft I82 projects through the wall I85 and outside the same has anoperating arm I81 located in the indentation I88 and by means of whichthe shaft may be rocked. It will be seen that rocking the shaft willlower the bar I10 and With it the two rolls I88 and I59.

A collar I89 is fastened adjustably about the shaft I82 by a set screwI90. The collar supports a pin I9I receiving one end of a coil tensionspring I92, the other end of which is engaged in a pin I93 in the webI13. This spring normally maintains the handle I81 upwardly, in whichposition the presser rollers I58 and I69 are urged upwardly against thefeed rolls I 52 and I65 so as to press the work against the last twonamed rollers and thereby to clamp it in position. As is evident, thetension of the spring I92 may be varied by adjusting the collar I89.

A latch is provided for holding the rolls I68 and IE9 in downward orinoperative position. This latch includes a latch link I95 pivoted atI96 to a lower web of the front section 3!. A notch I91 is engageablewith a pin I98 on the shaft I82 when the shaft is rotated by the handleI81 to inactive position, a rotation of about degrees. The pin I98engages in the notch I9! and is thereby prevented from returning toactive position.

To release the latch, there is provided a plunger I99 forked at one endover the latch I5 and pivoted thereto at 255. The plunger passes throughthe wall I and has a push button ZiII on the outer end thereof withinthe indentation I35. A coil spring 252 engages between the pivot 255 andthe pin 2533 within the wall I85. This spring normally urges the plungerand with it the latch I95 into position to be engaged by the pin I95.Hence, normally, upon pressing down of the handle id? to lower thepresser rolls I and I55, the latch I25 will become effective to hold therolls in lower position. Pressing the button 2M, however, releases thelatch and permits the spring I52 to return the shaft I82 and, by meansof it, the presser rolls I58 and I59 to operating position.

There is also provided a work guide and stripper plate 2 H3. Thestripper plate portion 25 I has a front part 2I2 turned up at rightangles and having slots 253 engageable by the pivots upon which therolls I52 and 555 are mounted on the wall 98. The slots permit verticaladjustment of the plate. The plate has a central opening 2I4 throughwhich the die passes in the cutting operation. The work, however, ismaintained on the bottom side of the plate 2H so that, upon withdrawalof the punch, the work is stripped therefrom. A wire guide 215 extends,as shown in Fig. 20, to guide the work and keep it from irregularitieswhile passing laterally through the machine.

For aligning the direction of the feed rolls, and hence the directionimparted to the work passing through the machine, the rolls I58 and I59are mounted on the bar I55; and this bar, somewhat flexible, is attachedto an angle iron 225. The connection at one end is by means of a screwHI and a suitable spacer collar. There is a similar connection 22I atthe middle. At the other end, however, there is a screw 223 threadedthrough the bar I?!) and passing through the angle iron 225. Look nuts222 determine the spacing between the bar I15 and the angle iron 220and, of

course, permit a variation of this distance;

Since the angle iron 220 is substantially inflexible, adjustment of thenuts 222 will, by flexing of the bar IIti, vary the position of theroller I68 slightly forward or backward relative to the roller i 59 and,therefore, will vary the direction of travel of the stencil through themachine.

On the top of the table I51 are provided a series of guide lines 225 andan inner guide line 226. The guide lines 225 give the proper positionsfor the bottom of a stencil card for cutting one or more lines ofcharacters therein. The line 225 indicates a point to which the cardmust be inserted to insure thatthe' characters will be completelycontained within its'borders. A line I28 determines the distanceleftward to which the card must be moved to obtain proper cutting withinthe lateral limits thereof. There is also provided a smallsquare index221 indicating the size and alignment of the characters.

The operation of the device is as follows:

A suitable card C, on which it is desired to cut characters, is placedupon the table I61. The handle I8? is depressed, withdrawing-the presserrolls I68 and I59 from the rollers I52 and I55 so that the card may befed to the left until its left edge at least reaches the line 228, andinwardly at least to a point where its upper edge is as far in as theline 226, and with its lower edge on a line 225. The button 2M is thenpressed, unlatching the shaft I82 and permitting the presser rolls I68and I5!) to move upwardly and press the card against the rolls I52 andI65. By rotation of the hand wheel 83, the desired character is broughtbeneath the index 84. The operating handle I25 is then pressed downward-1y. During the first approximately twenty percent. of this downwardmovement, the cam I22 acts quickly upon the roller I29, causing the linkI30 to pivot about its center I3I and, by contact with the adjustablescrew I32, move one end of the horizontal centering lever I33 whichpivots about its center I34 to cause the rollers I36 on the other end toengage adjacent punch shanks, and thereby to fix the rotating punchcarriers against rotation and with the proper one centered in cuttingpositon. The extra height of the notch I56 in the punch plunger I55permits at least a part of this centering action to take place beforedisplacement of the punch begins.

During the next part of the movement of the handle I25, the roller I40operating on the cam edge I54 of the link I42 moves that link downwardlyand, through the ratchet mechanism, advances the feed roll I52 apredetermined space proper for the distance between successivecharacters. The roller I43 is over the hump of the cam prior to the timethat the actual cutting by the punch begins.

In the foregoing, it will be seen that the leverage of the handlethrough the toggle linkage is such that, during the movement so fardescribed, a relatively small amount of movement of the handle producesa comparatively large amount of movement of the punch shank. During thistime, the toggle links have been approaching a continuous line with thepivot I2I between the pivot H9 and the hub I24, increasing the leverageof the handle I25 and reducing the amount of movement of the plate H5and the plunger I05 for a given displacement of the handle I25. When thelever I25 is in its lower position after it has completed the centeringand feed operations and when the punch is about ready to pass throughthe material, its leverage is at its maximum. This gives the obviousadvantage that where very little power is required only a small amountis used, but where more is necessar it is provided. This also effects aconservation of handle movement in that, for the most part, littleactual displacement of the handle is required. When the handle forcesthe punch through the work, any deflection of the carrier 56 causes itto strike the screw 45 and thereby be prevented from further deflection.The rigid construction of the bed substantially prevents it fromdeflecting, it being designed to receive force at this point, asheretofore described.

Upon release of the handle, the springs I26 and I41, acting on thelinkages, return it to its starting positon. The centering mechanism byits spring I31 is also returned to starting position and the bell crankratchet arm I45 moves backward to another tooth on the ratchet wheel tobe ready for the new feed.

Should there occur a point for spacing between words, the button I56 ispressed and the handle I25 depressed until the pin I58 strikes the knobI65. In this operation, the handle will have gone down far enough toadvance the feed mechanism one notch but insufiiciently to have operatedthe punch in the work.

At the end of the line, the work is moved in toward the machine to asuccessive line 225 and the operation is repeated. Should it benecessary to replace the work in the machine after withdrawal, locationof a character of a given line over the square 22'! gauges the locationof that line relative to the punches.

As noted, the feed mechanism can be adjusted by the nuts 222 to insurethat the work will be fed in a proper line through the machine. It willbe seen by reference to Figs. and 8 that v the force applied by theeccentric lug I8 I. through the member I80 is nearer the presser rollerI68 than the roller I69. As a consequence, there is more pressureapplied to the feed roller I52 than to the follower roller I65.Approximately sixty percent. of the total pressure is applied to thefeed roller i52 and forty percent. to the trailing uide roller I65. Thefact that the bar no floats over the screws I15 and lit insures that thepressure will be divided between the two rollers.

Feeding the stencil board on the downward stroke reduces the possibilityof cutting one letter into another by error. There will always be a feedafter the work is inserted before the cutting takes place. There willalso be a full space,

or none at all, before a cut because of the action of the centering andlocking mechanism. It therefore, cooperates with the mechanism forfeeding on the down stroke to insure the full spacing. The return springof the handle mere- 1y acts for that purpose and not to cause thefeeding. Hence, the handle effort is reduced because it is necessary toovercome only a slight spring.

Only a short movement of the handle is required for the cutting, whichis made possible because of the great leverage of the toggle mechanism.

What is claimed is:

1. In a machine of the kind described, a bed, a carrier, means rotatablymounting the carrier on the bed, means on the carrier to be forcedagainst the bed, said means being eccentric relative to the carriermounting means, means on the bed to receive said means on the carrier,and a plurality of beams extending generally radially in all directionsfrom said receiving means to distribute the force and reduce deflectionof the bed.

2. In a machine of the kind described, a bed of generally circularshape, a support centrally of the bed to receive mechanism on the bed, apressure receiving means eccentric relative to the support, and aplurality of beams extending from the pressure receiving means to theedge of the bed to distribute the pressure, said beams extendingsubstantially in all diretcions from the pressure receiving means.

3. In a machine of the kind described, a carriage, a pair of shafts, alink shorter than the distance between them, means extending from eachshaft to which the link is attached, an operating lever connected to thefirst shaft, a plurality of cutting devices on the carriage, a carriagecentering means, means to operate the car.- riage centering meansattached to the first shaft, and adapted to be operated by said shaftdurin the first part of its movement, and means changing angularmovement of the second shaft to linear movement, said means connectingthe second shaft to a cutting device.

4. In a machine of the kind described, a reciprocable cutting device, ashaft, radially extending means on the shaft, means connecting theradially extendin means with the cutting device to move the same to andthen through the cutting zone, including means to change the arcuatemovement of the radially extending means to linear movementwithoutdisplacing the cutting device out of its line of travel, workshifting means, the connecting means being adapted to operate the workshifting means while moving the cutting device prior to the cuttingzone, and thereafter to move the cutting device through the cuttingzone.

5. In a machine of the kind described, a reciprocable cutting device, ashaft, radially extending means on the shaft, means connecting theradially extending means with the cutting device to displace the same,and including means to change arcuate movement of the radiallyextending.means to linear movement of the cutting device withoutdisplacing the cutting device out of its line of travel, work shiftingmeans, a cam and cam actuator between the shifting means and theconnecting means, the cam being shaped to operate the work shiftingmeans during the first part of rotation of the shaft and then to cease,and the connecting means being thereafter adapted to move the cuttingdevice through its cutting positions.

6. In a machine ofthe kind described, a driving shaft, a driven shaft,radially extending means on each shaft, a link pivotally connectedbetween the radially extending means shorter than the distance betweenthe shafts, a cam roller on the radially extending means of one shaftconcentric with the link pivot thereof, an actuatable element having anedge adapted to be contacted by the roller and displaced throughactuating range during the first part of the movement of said one shaft,a cutting means, and mechanism connecting the cutting means to thedriven shaft to cause said cutting means to be displaced through itscutting zone during the latter part of rotation of the driven shaft.

7. In a mechanism of the kind described, a plurality of cutting devices,a first shaft, power means to rotate the first shaft, centering meansfor the cutting devices, means on the first shaft for operating thecentering means during the early part of movement of the power means, asecond shaft, means for transmitting movement of the first shaft to thesecond shaft with increased mechanical advantage, during the latter partof the movement of the power means, and

means to. transmit said latter movement to one of the cutting devices tocause it to perform its cutting action.

8. In a mechanism of the kind described, a plurality of cutting devices,a first shaft, power means to rotate the first shaft, centering meansfor the cutting devices, means on the first shaft for operatin thecentering means during the early part of movement of the power means, asecond shaft, means for transmitting movement of the first shaft to thesecond shaft with increased mechanical advantage, during the latter partof the movement of the power means, means to transmit said lattermovement to one of the cutting devices to cause it to perform its outingacion, a work feed mechanism, and means connected with the second shaftfor operating the work feed mechanism.

9. In a mechanism of the kind described, a base, a rotary carriage onthe base, a plurality of cutters on the carriage, a centering means forfixing, the cutter positions, an oscillatable power means, a first shaftoperable thereby, a radially extending means on the first shaft having acam, a follower therefor, on the centering means, for operation of thecentering means upon initial oscillation of the power means, a secondshaft, a linkage between the shafts for causing displacement of thesecond shaft upon displacement of the first and causing greater angulardisplacement of the second shaft than the first, work shifting means,mechanism connected with the second shaft to cause operation of the workshifting means during the early movement of the second shaft, andmechanism operable by the second shaft to engage a predetermined cutterand to cause the same to engage the work during the latter movement ofthe second shaft.

10.. In a mechanism of the kind described, a base, a carriage mountedthereon for rotation about a vertical axis, a plurality of cutters onthe carriage, a centering means for fixing the cutter positions, firstand second parallel horizontal shafts, an operating arm on one shaft foroscillating the same, a plate on the first shaft having a cam surface, acam follower on the centering means engageable with the cam surface forcaus ing operation of the centering means during the early part of themovement of the first shaft, a plate on the second shaft, a link pivotedto'the plates on the twq shafts and shorter than the distance betweenthe shafts, a cam roller on the second shaft plate, work shifting means,a cam follower thereon operable by said cam roller on the second plate,the cam follower being shaped to operate the work shifting means duringthe early part of the displacement of the second shaft, a linearlydisplaceable means adapted to engage a predetermined cutter, and meanson the second shaft plate to displace the linearly displaceable meansupon movement of the second shaft.

HERBERT W. HEMPEL. WALTON C. MARSH.

